/*------------------------------------------------------------------------*/
/* Sample code of OS dependent synchronization object controls            */
/* for FatFs R0.07d  (C)ChaN, 2009                                        */
/*------------------------------------------------------------------------*/

#include <windows.h>    // Win32
//#include <ucos_ii.h>  // uC/OS-II

#include "../ff.h"

#if _FS_REENTRANT

/*------------------------------------------------------------------------*/
/* Create a Synchronization Object for a Volume
/*------------------------------------------------------------------------*/
/* This function is called in f_mount function to create a new
/  synchronization object, such as semaphore and mutex. When a FALSE is
/  returned, the f_mount function fails with FR_INT_ERR.
*/

BOOL ff_cre_syncobj(  /* TRUE:Function succeeded, FALSE:Could not create due to any error */
    BYTE vol,           /* Corresponding logical drive being processed */
    _SYNC_t *sobj       /* Pointer to return the created sync object */
)
{
    BOOL ret;

    *sobj = CreateMutex(NULL, FALSE, NULL);                 // Win32
    ret = (*sobj != INVALID_HANDLE_VALUE) ? TRUE : FALSE;   //

//  *sobj = VolumeSemId[vol];   // uITRON (give a static created sync object)
//  ret = TRUE;                 // The initial value of the semaphore must be 1.

//  *sobj = OSMutexCreate(0, &err);             // uC/OS-II
//  ret = (err == OS_NO_ERR) ? TRUE : FALSE;    //

    return ret;
}



/*------------------------------------------------------------------------*/
/* Delete a Synchronization Object                                        */
/*------------------------------------------------------------------------*/
/* This function is called in f_mount function to delete a synchronization
/  object that created with ff_cre_syncobj function. When a FALSE is
/  returned, the f_mount function fails with FR_INT_ERR.
*/

BOOL ff_del_syncobj(  /* TRUE:Function succeeded, FALSE:Could not delete due to any error */
    _SYNC_t sobj        /* Sync object tied to the logical drive to be deleted */
)
{
    BOOL ret;

    ret = CloseHandle(sobj);    // Win32

//  ret = TRUE;                 // uITRON (nothing to do)

//  OSMutexDel(sobj, OS_DEL_ALWAYS, &err);      // uC/OS-II
//  ret = (err == OS_NO_ERR) ? TRUE : FALSE;    //

    return ret;
}



/*------------------------------------------------------------------------*/
/* Request Grant to Access the Volume                                     */
/*------------------------------------------------------------------------*/
/* This function is called on entering file functions to lock the volume.
/  When a FALSE is returned, the file function fails with FR_TIMEOUT.
*/

BOOL ff_req_grant(  /* TRUE:Got a grant to access the volume, FALSE:Could not get a grant */
    _SYNC_t sobj    /* Sync object to wait */
)
{
    BOOL ret;

    ret = (WaitForSingleObject(sobj, _FS_TIMEOUT) == WAIT_OBJECT_0) ? TRUE : FALSE; // Win32

//  ret = (wai_sem(sobj) == E_OK) ? TRUE : FALSE;   // uITRON

//  OSMutexPend(sobj, _FS_TIMEOUT, &err));              // uC/OS-II
//  ret = (err == OS_NO_ERR) ? TRUE : FALSE;        //

    return ret;
}



/*------------------------------------------------------------------------*/
/* Release Grant to Access the Volume                                     */
/*------------------------------------------------------------------------*/
/* This function is called on leaving file functions to unlock the volume.
*/

void ff_rel_grant(
    _SYNC_t sobj    /* Sync object to be signaled */
)
{
    ReleaseMutex(sobj); // Win32

//  sig_sem(sobj);      // uITRON

//  OSMutexPost(sobj);  // uC/OS-II
}


#else

#error This file is not needed in this configuration.

#endif
